US2111827A - Gas burner - Google Patents

Description

GAS BURNER Filed. April 2, 1937' Patented Mar. 22, 1938 UNHTED states PATENT OFFIQ-E 1 Claim.

This invention relates to gas burners, and especially to the nozzles or discharge and mixing outlets for such burners. The device is particularly suitable for use with domestic .gas burners,

but is capable of use in other relations.

The object of the invention is to provide improved means for producing and insuring perfect combustion of the gas, with. a freedom from carbon deposits and requiring no cleaning or adjustment after installation.

The special object of the invention is to provide a gas and air mixing nozzle of the Venturi type with means for supplying secondary air to the flame, at the combustion point, which will insure a much hotter flame than otherwise, as Well as complete combustion.

One form of the invention is illustrated in the accompanying drawing in Which:-

Fig. 1 is a side elevation of the burner suitable for furnace use, provided with the improved nozzle. a

Fig. 2 is a front end view of the nozzle.

Fig. 3 is a rear endview.

Fig. 4 is a section on the line 4- 1 of Figs. 2 and 3. 7

Referring particularly to the drawing, 4 indicates a burner stand, supporting the pipe 12 which is connected to the gas supply pipe Ill and delivers the gas into a manifold 3, from which as many jets or nozzles may be tapped ofi as may be desired to use in the furnace. Two nozzles are shown in Fig. 1, each connected by a pipe 1 and bend 8 tothe nozzle 5. Pilot lights H are provided supplied by tubes 6 from a chamber 2 which may be supplied with constantgas through a tube 9. A plate I covers the main parts of the burner, the nozzles projecting upwardly through openings in the plate at the edges thereof. These parts may be of any suitable or proper 40 construction and may be varied as desired, ac-

cording to the type of furnace or the type of burner.

The nozzle comprises a casting cored to form a tapered or Venturi primary air passage l4. Thisreceives from the rear the gas supply pipe 15 supported by cross piece or bracket 16 secured to or forming a part of the casting, and the pipe 15 connects with a supply branch I. At its end within the air passage 14 the gas supply pipe is provided with a jet tip H which may be of any suitable type to spray the gas into the air and create a Venturi effect and form a mixture between the jet tip and the discharge outlet from the nozzle.

Also cored in the casting forming the nozzle is the secondaryair passage Hi. This is arcuate in cross section and tapers from back to front, and is preferably formed on the lower or under side of the nozzle, and so disposed so that its outlet Ell is directly below and adjacent to the discharge outlet 2! of the main portion of the nozzle. The function and purpose of the secondary or additional air supply passage 18 is to provide at the combustion point or discharge orifice of the nozzle, the secondary air, by an injector action being drawn upwardly into the combustion stream and assisting in the combustion of the mixture issuing from the outlet 25.

This construction has been found to give very eificient action and to correct defects which have been found to exist in mixing nozzles of the ordinary type.

Altho shown applied to a burner of a particular type, the nozzle is capable of use with various other types of burners or furnaces. It is particularly useful in conversion burners which are substituted for other burners or fire pots in domestic furnaces.

I claim: a

A combustion nozzle for gas burners comprising a unitary tapered casting having cored therein a tapered primary air passage circular in cross section and leading to a cylindrical discharge tube with its axis in alinement with the axis of said air passage, and also having cored therein a tapered secondary air passage arcuate in cross section and extending along one side of the said primary air passage and tube and terminating in a discharge outlet flush with the outlet from said tube at the end of the casting, and a gas jet pipe supported within said primary air passage at the axis thereof and in line with the axis of the tube.

DORSE MAcINTYRE WATERS.

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